Flat Design

A Flat-size piece must meet specific USPS parameters :

More than 11-1/2 inches long, or more than 6-1/8 inches high, or more than 1/4 inch thick

Must be at least 3-1/2 inches high and at least 5inches long and be at least 0.007 inch thick.

Must not be not more than 15 inches long or more than 12 inches high or more than 3/4 inch thick.

Must be rectangular with four square corners or with finished corners that do not exceed a radius of 0.125 inch (1/8 inch)

Say something interesting about your business here. Flat-size pieces must be flexible.

Test flats as follows:

1. Place the piece with the length parallel to the edge of a flat surface and extend the piece halfway off the surface.

2. Press down on the piece at a point 1 inch from the outer edge, in the center of the piece's length, exerting steady pressure.

3. The piece is not flexible if it cannot bend at least 1 inch vertically without being damaged.

 On any flat-size piece claimed at automation prices, the piece must bear an Intelligent Mail barcode with a delivery point routing code. The barcode may be anywhere on the address side as long as it is at least 1/8 inch from any edge of the piece. The portion of the surface of the piece on which the Intelligent Mail barcode is printed must meet the barcode dimensions and spacing requirements . Intelligent Mail barcodes are subject to standards. An additional Intelligent Mail barcode may also appear in the address block of an automation flat, when the qualifying Intelligent Mail barcode is not in the address block. Other non-USPS barcodes may appear on the address side of a flat if the barcode format is not discernable to automated postal flat-sorting equipment.